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HAMAMATSU,JAPAN

1.45K-536   I   Printed in Japan’99.06

 CONTENTS

SPECIFICATIONS ...................................................................................... 3

PANEL  LAYOUT ....................................................................................... 4

CIRCUIT  BOARD  LAYOUT ....................................................................... 5

BLOCK  DIAGRAM .................................................................................... 6

DISASSEMBLY  PROCEDURE ................................................................. 7

LSI  PIN  DESCRIPTION ............................................................................ 9

IC  BLOCK  DIAGRAM ............................................................................. 11

CIRCUIT  BOARDS .................................................................................. 12

TEST  PROGRAM & INITIALIZE ............................................................... 16

MIDI  IMPLEMENTATION  CHART ............................................................ 18

PARTS  LIST

OVERALL  CIRCUIT  DIAGRAM

SERVICE MANUAL

PK

 

 

001629

Summary of Contents for Portatone PSR-540

Page 1: ...IFICATIONS 3 PANEL LAYOUT 4 CIRCUIT BOARD LAYOUT 5 BLOCK DIAGRAM 6 DISASSEMBLY PROCEDURE 7 LSI PIN DESCRIPTION 9 IC BLOCK DIAGRAM 11 CIRCUIT BOARDS 12 TEST PROGRAM INITIALIZE 16 MIDI IMPLEMENTATION CHART 18 PARTS LIST OVERALL CIRCUIT DIAGRAM SERVICE MANUAL PK 001629 ...

Page 2: ...PSR 540 6 28CA1 8813687 ...

Page 3: ...ry data bus 123 CMD0 I O Program memory Data bus 40 SMD15 I O Wave memory data bus 124 CMA21 O Program address bus 41 SOE O read signal 125 PDT15 I O SWX access data bus 42 SWE O write signal 126 PDT14 I O SWX access data bus 43 SRAS O RAS signal 127 PDT13 I O SWX access data bus 44 SCAS O CAS signal 128 PDT12 I O SWX access data bus 45 REFRESH O REFRESH signal 129 PDT11 I O SWX access data bus 46...

Page 4: ... DS3 O 27 NUM3 I 59 VSS8 Ground 28 IFS I Host interface select 60 MON0 O 29 SFORM I Format data 61 MON1 O Motor on 30 INP I Index pulse 62 MON2 O 31 READY I Ready from FDD 63 MON3 O 32 WPRT I Write control signal 64 VSS9 Ground KS0065B XV933A00 LCD DRIVER PIN NO NAME I O FUNCTION PIN NO NAME I O FUNCTION 1 SC29 O 31 Vcc LCD driver circuit 5V 2 SC28 O 32 CL1 I Data shift 3 SC27 O 33 CL2 I Latch clo...

Page 5: ...0 O 17 S6 O 57 C11 O 18 S5 O 58 C12 O 19 S4 O 59 C13 O 20 S3 O 60 C14 O 21 S2 O 61 C15 O 22 S1 O 62 C16 O 23 Vss Ground 63 S40 O 24 OSC1 I Oscillator 64 S39 O 25 OSC2 O Oscillator 65 S38 O 26 V1 66 S37 O 27 V2 67 S36 O 28 V3 Power supply 68 S35 O 29 V4 69 S34 O 30 V5 70 S33 O 31 CLK1 O Data latch clock 71 S32 O Segment signal output for LCD 32 CLK2 O Data shift clock 72 S31 O driving 33 Vdd Power ...

Page 6: ...heck again Check that the LCD displays OK Note Do not turn on the power switch by normal mode while standing by as the RAM data will be lost 47 047 Factry Set All the RAMs are initialized and set to the factory preset date when executing this test The results appear on the LCD 48 048 Test Exit Exit from the test program after executing this test 1 001 Version Displays Rom version Rom Program Wave ...

Page 7: ...henever the power is turned on The data listed below are backed up i e retained in the memory as long as either an AC adaptor is connected or a set of batteries is installed User Song Data Metronome Volume User One Touch Setting Data Touch On Off One Touch Setting Bank Number Touch Sensitivity EZ Chord Data Split Point EZ Chord Bank Number Data Accompaniment Split Point Smart Chord Number Footswit...

Page 8: ...PSR 540 C1 Note See parts list for details of circuit board component parts ...

Page 9: ...ote See parts list for details of circuit board component parts WARNING Components having special characteristics are marked and must be replaced with parts having specification equal to those originally installed ...

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